Add 15/42 and 10/72
15/42 + 10/72 is 125/252.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
15/42 = 15 × 12/42 × 12 = 180/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
10/72 = 10 × 7/72 × 7 = 70/504 - Add the two like fractions:
180/504 + 70/504 = 180 + 70/504 = 250/504 - 250/504 simplified gives 125/252
- So, 15/42 + 10/72 = 125/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42+10/72 15/42+20/72 15/84+10/72 45/42+10/72 15/42+30/72 75/42+10/72 15/42+50/72 15/42+70/72